CFV Startup Guide
Part No. 750-288 11
1.On the CB Falcon Operation screen, press the Firing Rate
display in the Modulation section.
2. A numeric keypad will appear, showing the current firing rate
and operating mode.*
3. Under Firing rate control select Manual in Run.
4. Press <Clear> to clear the current RPM value.
5. Enter the desired RPM setting using the numeric
keypad.
6. Press <OK>. The display will return to the Operation
screen and the burner will modulate to the chosen firing
rate.
*Use Manual in Run for normal manual operation. In Manual in Run
and Standby mode, the burner will not operate. Use this mode for
testing blower operation without firing the boiler.
If any of the following conditions occur:
• Loss of flame
• Excessive or unusual noise
• Flame appears irregular when viewed through sight glass
• Frequent low water shutdowns
Cease boiler operation. See the Troubleshooting section in the CFV manual or consult your authorized CB
representative.
Repeated nuisance low water shutdowns may indicate a problem with the boiler feed system and/or water
level controls.
4 - POST STARTUP
• Review Chapter 4 - Commissioning in the CFV manual. Ensure all safety checks have been performed
according to instructions.
• Set high gas pressure switch to 50% higher than operating gas pressure at low fire. Set low gas pressure
switch to 50% lower than operating gas pressure at low fire.
• Check the draft on the outlet stack and compare to acceptable limits (-0.25 to +0.25 inches WC).
Operating outside of acceptable limits could result in light off and flame failure problems.
• Verify gas pressure remains within limits shown in Table 1.
• A new boiler should be cleaned by boil-out prior to being placed into service. See Chapter 4 of the CFV
manual for boil-out procedure.
Figure 13
Notice
The CFV has been factory tested at 1000’ ASL and tuned for 5-6% excess
O
2
. To ensure optimum combustion throughout the firing range, the O
2
%
should be verified and if necessary adjusted to the proper levels. This
procedure involves manually firing the burner while using a combustion
analyzer to monitor O
2
%. Low and high fire adjustments are made at the
main gas valve. See the CFV Operation and Maintenance manual for a
detailed procedure.
Note: If an alarm or lockout occurs
during startup or operation, see
the boiler Operation and
Maintenance manual.
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